Why are SMS messages not delivered via WhatsApp - briefly?
SMS messages are not delivered via WhatsApp because WhatsApp is an internet-based messaging service that uses data to transmit messages, while SMS relies on cellular networks and is a separate communication protocol. Additionally, WhatsApp does not have access to the traditional SMS infrastructure required for message delivery.
Why are SMS messages not delivered via WhatsApp - in detail?
SMS messages are not delivered via WhatsApp due to several fundamental reasons that stem from the distinct technological underpinnings and operational models of these two communication platforms.
Firstly, SMS (Short Message Service) is a text messaging service component of most telephone, internet, and mobile-based communication systems. It uses the control channel of existing GSM networks to transmit short messages between devices. In contrast, WhatsApp is an over-the-top (OTT) messaging application that operates on top of data networks such as 3G, 4G, LTE, or Wi-Fi. The core difference lies in the protocols and infrastructure they rely upon. SMS uses SS7 (Signaling System No. 7) for message delivery, while WhatsApp employs IP (Internet Protocol) to send messages.
Secondly, the business models of these two services are inherently different. SMS is a service provided by mobile network operators (MNOs) and is typically charged on a per-message basis. Conversely, WhatsApp operates as a free or subscription-based messaging application, generating revenue primarily through user data and business solutions. Integrating SMS delivery into WhatsApp would require complex billing arrangements and interoperability agreements with MNOs, which could undermine WhatsApp's existing business model.
Moreover, the encryption and security protocols used by these services are not compatible. SMS messages have limited encryption capabilities and are generally considered less secure compared to modern messaging platforms like WhatsApp. WhatsApp employs end-to-end encryption, ensuring that only the communicating users can read the messages. Integrating SMS into this system would introduce security vulnerabilities and complicate WhatsApp's commitment to user privacy.
Another significant reason is the difference in message formats and transmission methods. SMS has a character limit of 160 characters per message, while WhatsApp supports much longer messages with multimedia content such as images, videos, and documents. The transmission method for SMS involves sending messages through the mobile network's signaling system, which is not designed to handle the data-heavy transmissions typical of WhatsApp.
Lastly, regulatory and compliance issues play a role in this incompatibility. Many countries have regulations governing SMS services due to their widespread use for critical communications like emergency alerts and banking notifications. Complying with these regulations while maintaining WhatsApp's global operations would be an administrative challenge.
In conclusion, the technical architecture, business models, security protocols, message formats, and regulatory compliance of SMS and WhatsApp are fundamentally different, making it impractical and inefficient for SMS messages to be delivered via WhatsApp.